energy is being produced to power our lives. while energy development comes with some risk, north america's natural gas producers are committed to safely and responsibly providing generations of cleaner-burning energy for our country, drilling thousands of feet below fresh water sources within self-contained well systems. and, using state-of-the-art monitoring technologies, rigorous practices help ensure our operations are safe and clean for our communities and the environment. we're america's natural gas. a short word that's a tall order. up your game. up the ante. and if you stumble, you get back up. up isn't easy, and we ought to know. we're in the business of up. everyday delta flies a quarter of million people while investing billions improving everything from booking to baggage claim. we're raising the bar on flying and tomorrow we will up it yet again. >>> crowd is beginning to walk into the debate hall at the university of denver. they are getting ready for this first of three presidential debates. there will be one vice